SM-11 Seal has been designed for high volume production. This type of seal can be used regardless of direction or rotation. The unique rubber bellows secondary seals provide a high degree of axial flexibility to compensate for misalignment and lack of concentricity of the shaft and due to thrust movement of the shaft as there is no relative movement between the rubber bellows and the shaft. These seals offers a very high degree of interchangeability with the various contemporary seals.